Sefer Ha’Ikrim writes, “Bitachon in Hashem is greater than all praises that one can say to Hashem.” 

This is because one can say that Hashem can do everything, that He loves us and helps us, but it may be that his heart doesn’t believe what he is saying. 

But, when one has bitachon, that proves he believes in all the above. He believes that Hashem loves him, cares for him, and will help those who rely on Him. 

Bitachon is the greatest praise because he lives and practices what he believes in.

~ R’ Elimelch Biderman shlita